code: def _path(opt):
      build(opt)
  
      dt = opt["datatype"].split(":")[0]
  
      if dt == "train" or dt == "valid":
          suffix = "dev"
      elif dt == "test":
          suffix = "test"
      else:
          raise RuntimeError("Not valid datatype.")
  
      data_path = os.path.join(
          opt["datapath"],
          COPA,
          COPA_RESOURCES_FOLDER_NAME,
          COPA_DATASETS_FOLDER_NAME,
          COPA_DATASET_PREFIX + suffix + ".xml",
      )
  
      return data_path
  
file_path: ParlAI/parlai/tasks/copa/agents.py
imports: from parlai.core.teachers import DialogTeacher
  from .build import build
  import xml.etree.ElementTree
  import os
  import copy
label_desc: Use image node_id 1 for calling a global function with example usage: _path(opt) and returns: data_path